RENTON, Wash. — The Seattle Seahawks have added defensive end Derek Walker to their active roster and released wide receiver Mike Hass.

Walker made Seattle’s opening day roster out of training camp, but was inactive in his only game this season on the active roster. He was released and signed to the practice squad on Sept. 15.

Hass, a former star at Oregon State, was signed to Seattle’s practice squad on Sept. 7 and to the active roster on Nov. 3. He was inactive last Sunday when the Seahawks beat Detroit.

Seattle also released guard Brian De La Puente from the practice squad.

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